gopacket | 易学教程

How do you use the tcp assembly package in gopacket?

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问题 I've been using the pcap package along with gopacket to parse network traffic with pretty good success. These libraries have made it much easier to work with network captures and they've definitely saved me a ton of time. I'd like to take it a step further and use the tcp assembly package to start reassembling TCP streams, but I'm not really sure from the examples provided in the docs how to go about it. The link is here: http://godoc.org/code.google.com/p/gopacket/tcpassembly/tcpreader What

How do you use the tcp assembly package in gopacket?

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Sending UDP packets with gopacket

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问题 I am trying to send UDP packets to a remote host like this conn, err := net.ListenPacket("ip4:udp", "0.0.0.0") if err != nil { panic(err) } ip := &layers.IPv4{ SrcIP: saddr, DstIP: dip, Protocol: layers.IPProtocolUDP, } udp := &layers.UDP{ SrcPort: layers.UDPPort(sport), DstPort: layers.UDPPort(us.Port), } udp.SetNetworkLayerForChecksum(ip) buf := gopacket.NewSerializeBuffer() opts := gopacket.SerializeOptions{ ComputeChecksums: true, FixLengths: true, } if err := gopacket.SerializeLayers(buf

Changing the IP address of a Gopacket and re-transmitting using raw sockets

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问题 I'm writing a program that reads all packets passing through the computer running it. I wish to grab a packet (either by dst ip or src ip), then change the dstIP and TCP dstPort and put it back on the wire. I have no problems with changing the dstIP, but how do I serialize it properly so the packet isn't malformed and gets to the destination in which I want it to go? package main import ( "code.google.com/p/gopacket" "code.google.com/p/gopacket/layers" "code.google.com/p/gopacket/pcap" "fmt"

compile gopacket on windows 64bit

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问题 I am trying to use gopacket on my windows 10. I'm using it to sniff and inject packets directly to/from the NIC. I can easily compile and run my code with GOARCH=386 but can't in GOARCH=amd64. Worth noticing: I am NOT trying to cross-compile. I'm using go1.6.windows-386 to compile the 32bit version and when I try to compile with GOARCH=amd64 I use go1.6.windows-amd64. I used TDM-GCC as linux like compile tools. The error isn't indicative. it just says c:/WpdPack/Lib/x64/wpcap.lib: error

How to use Golang to compose raw TCP packet (using gopacket) and send it via raw socket

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问题 I would like to craft custome TCP packets using gopacket and then send them using raw sockets. Here is a short and readable example go program that demonstrates what I'd like to do: package main import ( "code.google.com/p/gopacket" "code.google.com/p/gopacket/examples/util" "code.google.com/p/gopacket/layers" "log" "net" ) func main() { defer util.Run()() // XXX create tcp/ip packet srcIP := net.ParseIP("127.0.0.1") dstIP := net.ParseIP("192.168.0.1") //srcIPaddr := net.IPAddr{ // IP: srcIP,

compile gopacket on windows 64bit

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I am trying to use gopacket on my windows 10. I'm using it to sniff and inject packets directly to/from the NIC. I can easily compile and run my code with GOARCH=386 but can't in GOARCH=amd64. Worth noticing: I am NOT trying to cross-compile. I'm using go1.6.windows-386 to compile the 32bit version and when I try to compile with GOARCH=amd64 I use go1.6.windows-amd64. I used TDM-GCC as linux like compile tools. The error isn't indicative. it just says c:/WpdPack/Lib/x64/wpcap.lib: error adding symbols: File in wrong format collect2.exe: error ld returned 1 exit status Did anyone manage to